scala中的伴生类和伴生对象

object 山东理工大学c {
  class Student() {
    private val name:String ="小花"
  }
  obgect Student{
    def sayHello(stu:Student):Unit={
      println(s"${stu.name}")
    }
  }
  def main(args:Array[String]):Unit={
    val stu1 = new Stuydent()
    student.sayHello(stu1)

  }

}